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COMPRESSORSCOMPRESSORS
INTRODUCTION TOINTRODUCTION TO
MECHANICAL ENGINEERING DEPARTMENTMECHANICAL ENGINEERING DEPARTMENT
Engineering for the Petroleum and Process Industries
WHAT ARE COMPRESSORS ?WHAT ARE COMPRESSORS ?
Compressors are machines used to increase the total energy level Compressors are machines used to increase the total energy level of a compressible fluid (either gas or vapor).of a compressible fluid (either gas or vapor).
Molecular weight of compressed gas vary from 2 (Hydrogen) ~ 352 Molecular weight of compressed gas vary from 2 (Hydrogen) ~ 352 (uranium hexafluoride)(uranium hexafluoride)
WHAT ARE COMPRESSORS APPLICATIONS ?WHAT ARE COMPRESSORS APPLICATIONS ?
Compressors applications vary from home refrigerator to large Compressors applications vary from home refrigerator to large complex petrochemical plantscomplex petrochemical plants
Compressors can be used for:Compressors can be used for:
Gas transmission through pipelinesGas transmission through pipelines
Storage and transmission of energy (Storage and transmission of energy (e.g.e.g. shop air compressionshop air compression))
Volume reduction for storage or transportation (Volume reduction for storage or transportation (e.g. LPG, LNG)e.g. LPG, LNG)
Process requirements (Process requirements (e.g. chemical reactions)e.g. chemical reactions)
Energy conversion (Energy conversion (e.g. Ref. system, heat pumpse.g. Ref. system, heat pumps))
COMPRESSOR TYPESCOMPRESSOR TYPESCOMPRESSOR TYPESCOMPRESSOR TYPES
DYNAMIC DYNAMIC DYNAMIC DYNAMIC POSITIVE DISPLACEMENTPOSITIVE DISPLACEMENTPOSITIVE DISPLACEMENTPOSITIVE DISPLACEMENT
EjectorEjectorEjectorEjector CentrifugalCentrifugalCentrifugalCentrifugal AxialAxialAxialAxial RotaryRotaryRotaryRotary ReciprocatingReciprocatingReciprocatingReciprocating
VaneVaneVaneVane Liquid RingLiquid RingLiquid RingLiquid Ring ScrewScrewScrewScrew LobeLobeLobeLobe
Single ActingSingle ActingSingle ActingSingle Acting
Double ActingDouble ActingDouble ActingDouble Acting
Free PistonFree PistonFree PistonFree Piston
LabyrinthLabyrinthLabyrinthLabyrinth
DiaphragmDiaphragmDiaphragmDiaphragm
SELECTION OF COMPRESSORSSELECTION OF COMPRESSORS
POSITIVE DISPLACEMENT COMPRESSORSPOSITIVE DISPLACEMENT COMPRESSORSRECIPROCATING COMPRESSORSRECIPROCATING COMPRESSORS
POSITIVE DISPLACEMENT COMPRESSORSPOSITIVE DISPLACEMENT COMPRESSORS
Positive Displacement Compressors, are Positive Displacement Compressors, are machines in which successive volumes of gas are machines in which successive volumes of gas are confined within a closed space where the confined within a closed space where the pressure is increased as volume of the closed pressure is increased as volume of the closed space is decreased. space is decreased.
RECIPROCATING COMPRESSORSRECIPROCATING COMPRESSORS
Reciprocating compressors are positive displacement machines Reciprocating compressors are positive displacement machines that compress and move gases by using a combination of that compress and move gases by using a combination of RotationalRotational and and LinearLinear (Reciprocating) motion (Reciprocating) motion
HOW RECIPROCATING COMPRESSORS HOW RECIPROCATING COMPRESSORS WORK ?WORK ?
Reciprocating compressors are positive Reciprocating compressors are positive displacement machines that compress and displacement machines that compress and move gases by using a combination of move gases by using a combination of RotationalRotational and and LinearLinear (Reciprocating) motion (Reciprocating) motion
Ideal Reciprocating Compressor cycle as Ideal Reciprocating Compressor cycle as following:following:
SuctionSuction
CompressionCompression
Discharge Discharge
ExpansionExpansion
RECIPROCATING COMPRESSORS RECIPROCATING COMPRESSORS CLASSIFICATIONCLASSIFICATION
Reciprocating compressors are available in:-Reciprocating compressors are available in:-
CrankCrank
Piston RodPiston Rod Cross Cross HeadHead
Trunk Trunk PistonPiston
PistonPiston
Connecting Connecting RodRod
Cylinder Cylinder VolumeVolume
Rod Rod PackingPacking
Head-End Head-End Cylinder Cylinder VolumeVolume
Crank-End Crank-End Cylinder Cylinder VolumeVolume
Single Acting (Single Acting (Trunk or automotive piston TypeTrunk or automotive piston Type))
Double acting (Double acting (Cross Head TypeCross Head Type))
RECIPROCATING COMPRESSORSRECIPROCATING COMPRESSORS
RECIPROCATING COMPRESSORSRECIPROCATING COMPRESSORS
RECIPROCATING COMPRESSORS CONSTRUCTIONRECIPROCATING COMPRESSORS CONSTRUCTIONCRANK SHAFTCRANK SHAFT
Robust Guidesand Frame
Steel backed tri-metal Shoes and Bearings
Heavy Duty Guide Support
Consolidated ReliefValve simplifies the
Oil System
Large Selection ofStandard CylindersLarge Access To Crosshead
Guide and Packing
44” (1118 mm) Throw Spacing
Digital No-Flow LubricationCounter and Shutdown
Small BorePiston & Step Liner
Medium Bore Piston & Liner
Variable VolumeHead – Common To 3 Diameters
Cylinder Body &Piston Rod CommonTo 3 Diameters
Large Bore Piston & Stub Liner
RECIPROCATING COMPRESSORS VALVES CONSTRUCTIONRECIPROCATING COMPRESSORS VALVES CONSTRUCTION
Plate valvePlate valve
RECIPROCATING COMPRESSORS VALVES CONSTRUCTIONRECIPROCATING COMPRESSORS VALVES CONSTRUCTION
Pre-lube Pump Lubricator
Oil-level Controller
(option)
Oil Filter Mount
Digital No-Flow Timer
Divider Block
Oil Pressure Gauges
Frame & Cylinder LubricationFrame & Cylinder Lubrication
Plate-type Oil Cooler
RECIPROCATING RECIPROCATING COMPRESSORSCOMPRESSORS
RECIPROCATING COMPRESSORS CONSTRUCTIONRECIPROCATING COMPRESSORS CONSTRUCTIONPISTON ROD PACKINGPISTON ROD PACKING
RECIPROCATING COMPRESSORS CONSTRUCTIONRECIPROCATING COMPRESSORS CONSTRUCTIONCROSS HEADCROSS HEAD
RECIPROCATING COMPRESSORS CONSTRUCTIONRECIPROCATING COMPRESSORS CONSTRUCTIONCONNECTING RODCONNECTING ROD
RECIPROCATING COMPRESSORS CONSTRUCTIONRECIPROCATING COMPRESSORS CONSTRUCTIONCRANK SHAFTCRANK SHAFT
Locking Collar
Variable Volume Clearance PocketsVariable Volume Clearance Pockets
RECIPROCATING RECIPROCATING COMPRESSORS COMPRESSORS
PULSATION DAMPENERPULSATION DAMPENER
RECIP. COMPRESSORS RECIP. COMPRESSORS GAUGE BOARD GAUGE BOARD
RECIP. COMPRESSORS DRIVE METHODSRECIP. COMPRESSORS DRIVE METHODS
Electric MotorElectric Motor
RECIP. COMPRESSORS DRIVE METHODSRECIP. COMPRESSORS DRIVE METHODS
Internal Combustion Gas EngineInternal Combustion Gas Engine
CENTRIFUGAL COMPRESSORSCENTRIFUGAL COMPRESSORS
HOW CENTRIFUGAL COMPRESSORS WORK?HOW CENTRIFUGAL COMPRESSORS WORK?
1
2
3
1- GAS INITIAL CONDITION AT INLET
2- GAS AFTER ACCELERATION
3- GAS AFTER DECELERATION
FROM BENOLLI EQUATION:
P3+RV3/2+RGZ3 = P2+RV2/2+RGZ2
CENTRIFUGAL COMPRESSORS CENTRIFUGAL COMPRESSORS IMPELLER TYPESIMPELLER TYPES
HORIZONTALLY SPLIT COMPRESSORS TOP NOZZLESHORIZONTALLY SPLIT COMPRESSORS TOP NOZZLES
HORIZONTALLY SPLIT BACK TO BACK HORIZONTALLY SPLIT BACK TO BACK ARRANGEMENT COMPRESSORSARRANGEMENT COMPRESSORS
HORIZONTALLY SPLIT HIGH FLOW HORIZONTALLY SPLIT HIGH FLOW COMPRESSORSCOMPRESSORS
VERTICALLY SPLIT COMPRESSORSVERTICALLY SPLIT COMPRESSORSTOP NOZZLESTOP NOZZLES
VERTICALLY SPLIT VERY HIGH PRESSURE VERTICALLY SPLIT VERY HIGH PRESSURE COMPRESSORSCOMPRESSORS
VERTICALLY SPLIT PIPELINE COMPRESSORSVERTICALLY SPLIT PIPELINE COMPRESSORS
HIGH SPEED INTEGRALLY GEARED CENTRIFUGAL HIGH SPEED INTEGRALLY GEARED CENTRIFUGAL COMPRESSORSCOMPRESSORS